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/*
* ioctl.c
*
* Copyright (C) 1995, 1996 by Volker Lendecke
* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
*
*/
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/ncp.h>
#include <linux/ncp_fs.h>
int ncp_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct ncp_server *server = NCP_SERVER(inode);
int result;
struct ncp_ioctl_request request;
struct ncp_fs_info info;
switch (cmd) {
case NCP_IOC_NCPREQUEST:
if ((permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if ((result = verify_area(VERIFY_READ, (char *) arg,
sizeof(request))) != 0) {
return result;
}
copy_from_user(&request, (struct ncp_ioctl_request *) arg,
sizeof(request));
if ((request.function > 255)
|| (request.size >
NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
return -EINVAL;
}
if ((result = verify_area(VERIFY_WRITE, (char *) request.data,
NCP_PACKET_SIZE)) != 0) {
return result;
}
ncp_lock_server(server);
/* FIXME: We hack around in the server's structures
here to be able to use ncp_request */
server->has_subfunction = 0;
server->current_size = request.size;
copy_from_user(server->packet, request.data, request.size);
ncp_request(server, request.function);
DPRINTK(KERN_DEBUG "ncp_ioctl: copy %d bytes\n",
server->reply_size);
copy_to_user(request.data, server->packet, server->reply_size);
ncp_unlock_server(server);
return server->reply_size;
case NCP_IOC_CONN_LOGGED_IN:
if ((permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
return ncp_conn_logged_in(server);
case NCP_IOC_GET_FS_INFO:
if ((permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if ((result = verify_area(VERIFY_WRITE, (char *) arg,
sizeof(info))) != 0) {
return result;
}
copy_from_user(&info, (struct ncp_fs_info *) arg, sizeof(info));
if (info.version != NCP_GET_FS_INFO_VERSION) {
DPRINTK(KERN_DEBUG "info.version invalid: %d\n", info.version);
return -EINVAL;
}
/* TODO: info.addr = server->m.serv_addr; */
info.mounted_uid = server->m.mounted_uid;
info.connection = server->connection;
info.buffer_size = server->buffer_size;
info.volume_number = NCP_FINFO(inode)->volNumber;
info.directory_id = NCP_FINFO(inode)->DosDirNum;
copy_to_user((struct ncp_fs_info *) arg, &info, sizeof(info));
return 0;
case NCP_IOC_GETMOUNTUID:
if ((permission(inode, MAY_READ) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if ((result = verify_area(VERIFY_WRITE, (uid_t *) arg,
sizeof(uid_t))) != 0) {
return result;
}
put_user(server->m.mounted_uid, (uid_t *) arg);
return 0;
default:
return -EINVAL;
}
return -EINVAL;
}
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